Cloud-based tech giants like Amazon, Google and Uber are changing the economy, and not for the better, asserts Yanis Varoufakis, a former finance minister of Greece and a professor at the University of Athens, who has written a book about the dangers of what he calls the "cloudalists."

Financial technology startups have developed some useful technology for consumers, such as automated savings, says Tescher, who founded the Financial Health Network 20 years ago. But some fintech innovations are more questionable.